Yarn tension device



Jan. 2, 1940. J. D? FRIDAY YARN TENSION DEVICE Filed Jan. 16, 19-39 z mm Patented Jan. 2, 1940 r t UNITED STATES PATENT oFF1c-E YARN TENSION DEVICE. ames 1). Friday, Cherryvill'e, o. Application January 16,1939, Serial No. 251,224 2 Claims. (01, 242-450) Inwinding yarn or thread from small (bobbins onto larger spools for use in twisters or doublers,

the yarn is passed through a tension device including a movable tensionmember and itssup- 5 port, the support being provided at its free end with a leading-in guide or fork composed of diverging arms. As the yarn passes through the tension device, it not only wears away the top yarn contact surface of the support so as to ultilu mately cut a deep groove therein, but it also cuts into the crotch of the leading-in guide or fork, thereby causing the yarn to roughen' or chafe and rendering the movable tension member inopera-- tive by removing its pressure on the yarn. As

a consequence, the tension support has had to be replaced frequently at a considerable expense.

In an efiort to overcome this undesirable occurence, it has beenproposed to provide a replaceable stationary member between the mov-.

2a; able tension member and the upper surface of its support for protecting the support from wear and to permit the further use of a support-having aworn upper yarn contact surface. A device accordingto thisprior proposal is disclosed is in U. S. Patent 1,708,514, granted April 9, 1929,

to J. O. McKean.

While this prior device was satisfactory to some extent, in that it prevented the cutting of a groove in the upper yarn contact surface of 30 the support, it .did not entirely solve the problem, the leading-in guide 101' fork being still left unrpotected so that the yarn-would continue to cut into the crotch of the leading-in guide or fork and cause roughening or chafing of the 35 yarn to such an extent as to render thesupport unfit for further use;

The object of my invention, therefore, is to provide a replaceable stationary member interposed between the movable tension member and] 40 its support for not only protecting the upper yarn contact surface of the latter from wear, but having an etxension at one end disposed to engage or rest upon the arms of the leading-in guide or fork and having a porcelain or like yarn 45 guiding eye which Will keep the yarn out of contact with the crotch of the leading-in guide or fork and elfectivelyresist wear by the yarn as it passes to and under the'movable tension mem.

ber. In this way, thesupport of the tension 50 device is completely protected against wear on all of its yarn contact surfaces, thereby rendering the support capable of almost indefinite satisfactory operation. Also, by the use of the present member, worn tension devices can .be used fur- 55 ther even though having worn yarn contacting surfaces, the replaceable stationary member,'aside from the yarn guiding eye, being made of case' hardened steel and nickel plated to provide wearing surfaces which are smooth andwhich will resist the wearingv effect of the ,yarn'to a, much ;5 greater degree than the. material of which the tension support can reasonably be made. *The present invention is illustrated as to a preferred embodiment in the accompanying drawing, in which: r 1 10 Figure 1 is a top plan view of a yarn tension device equipped with-a replaceable memberconstructed in accordance with the present invenition.

Figure 1; and e Figure 3 is a perspective view ofthe replaceable stationary member per se. I r Referring in detail to the'dra'wing, my invention is illustrated in connection with a yarn tension device comprising a tensionrhead 5 which forms a support for a pair of gravity-operated weighted tension washers 6 which are loosely mounted on pins projectig upwardly from the usual upper yarn contact surface 1 ofthe supv port along which the yarn is drawn beneath the washers 6. The usual yarn guide 8, forpreventing the washers from jumping'oif ,oftheirpins, is pivoted to the support at 9. At its free end,

the support 5 is provided with the usual leading- 3 cin guide or forklll-which is composed of apair of diverging arms inclined outwardly and downwardly as shownclearlyin Figure. 2. The usual tension equalizing bar H is provided, overwhich the yarn passes from the washers 6,

To eliminate wear upon the usual upperyarn contact surface I of the support 5 andin the crotch of the leading-in guide or fork Ill, by the passage of the yarn thereover and therethrough,

respectively, or to render further useful, supports 40 l 3 having worn yarncontact surfaces, I provide a replaceable stationary member l2 consisting of'a plate of case-hardened steel which is nickel plated. One end of'this plate is of narrow elon gated form and provided withholes l3 for rev I ceiving the projectingpins on which'the washers 6 are placed, thereby properly positioning the plate on the support 5 with the narrow elongated end portion of the plate disposed on the upper yarn contact surface 1 of the support and may e stationary position.) The other end portion of the plate is enlarged laterally and directed outwardly and downwardly at an angle as at M so as to span the space between and rest upon the 7 upper surface ofthe arm of'the "leading-in guide Figure 2 is a vertical sectionon line 2--2Mof Gil yarn into the same, and this slot communicates .7

with a longitudinal slot I! in the plate portion I4 leading inwardly from the outer end edge of the latter so that the yarn.,may bereadily passed into the slot I? and through the slot It to and within the guiding eye l5. When threaded through the eye IS, the yarn is held out of contact with the crotch of the leading-in guide or fork I0 so that the latter is not subjected to wear in the usual way and the yarn contacts only the interior surface of the eye I5 at the inner or closed side of the latter before passing beneath the washers 6. The yarn is then passed over the narrow elongated end portion of plate i2 between the latter and the washers 6 and finally pases over the equalizing bar II in the usual way. Thus,the yarn is not only prevented from contacting the usual upper yarn contact surface 7 of the support 5, but is kept out of contact with the crotch of the leading-in guide or fork l9 and only contacts guiding surfaces of the plate l2 and eye I5 which are of high wearresisting quality. By threading the yarn into the slots l1 and 5 so as to pass through the eye I5 in operation, there is no danger of the threads becoming positioned beneath the narrow elongated end portion of plate I 2. However, additional guard against this happening may be had by providing the usual depending side flange It on the narrow elongated end portion of plate 12 as shown in the McKean patent above-mentioned, such flange also aiding in keeping the plate in a more rigid relationship to the support.

In view of, the above, it will be seen that I have provided a readily replaceable stationary member for coaction with the usual support and movable tension member of a yarn tensioning device, said replaceable member being such as to effiectively resist wear and prevent wearing of the usual yarn contact surfaces 'of the support due to passage of the yarn thereagainst or thereover. When the replaceable member does utlimately wear to some extent, it can be readily replaced at a slight expense. Numerous tensioning devices of this character which are now in operation or have been discarded can be successfully used for a considerable length of time by use of the present invention in connection therewith, thereby obviating the necessity of replacing the support.' The actual need in devices of this kind is supplied completely and not in a partial manner as previously proposed, thereby affording a full solution to the entire problem presented. a

What I claim as new is:

1, In a yarn tension device, a tension washer, a stationary support therefor having an upper yarn contact surface under said washer and provided at one end with a forked leading-in'guide having a yarn contact surface at the crotch thereof, and a replaceable non-yielding stationary wearing plate having an end portion located upon said upper yarn contact surface for protecting the same from wear, said wearing plate having its other end portion directed outwardly and downwardly and laterally widened to rest upon the upper surfaces of the arms of said leadingin guide and span the space therebetween, said last-named end of the wearing plate having an opening, and a yarn guiding eye removably disposed in said opening and arranged to guide the yarn out of contact with the said yarn contact surface at the crotch of the leading-in guide.

2. In a yarn tension device, a tension washer, a stationary support therefor having an upper yarn contact surface under said washer and provided at one end witha forked leading-in guide having a yarn contact surface at the crotch thereof, and a replaceable non-yielding stationary wearing plate having an end portion located upon said upper yarn contact surface for pro tecting the same from wear, said wearing plate having its other end portion directed outwardly and downwardlyandlaterallywidened to rest upon the upper surfaces of the arms of said leading-in guide and span the space therebetween, said last named end of the wearing plate having an opening, and a yarn guiding eye removably disposed in said opening and arranged to guide the yarn out of contact with the said yarn contact surface at the crotch of the leading-in guide, said enlarged end portion of the plate having a longitudinal slot extending inwardly from the outer end edge thereof to the outer side of said eye, and the outer side of said eye being provided with an open longitudinal slot registered with the lastnamed slot to facilitate threading of the yarn into said eye.

JAMES D,- FRIDAY' 

